Incandescent electric lamp.



No. 753,935. PATENT/EDMAR. s, 1904. H. M. TAYLOR.

INGAND'ESGENT ELECTRIC LAMP. APPLIOATIOH'FILED saw. 2, 1902.

H0 MODEL.

Witnesses a]jf/2 Inventor,

v By 7(. W

Attorneys UNTTED STATES Patented March 8, 1904.

PATENT GEEICE.

HERBERT MUNRO- TAYLOR, OF HAMILTON, CANADA.

INCANDESCENT ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 7 53,935, dated March8, 1904.

Application fil dfieptember 2, 1902. Serial No. 121,785. (No model.)

To all whom it may concern.-

Be it known that I, HERBERT MU'NRO TAY- LOR, manufacturer, 2. citizenofthe Dominion of Canada, residing at No. 60 King street, west, in thecity of Hamilton, in the county of Wentworth, in the Province ofOntario, Canada, have invented certain new and useful Improvements inIncandescent Electric Lamps; and I do hereby declare that the followingis a full, clear, and exact description of the construction andoperation of the same.

My invention relates to lamps, and is especially applicable toincandescent electric lamps.

The object of the invention is to provide such a construction of thelamp and globe as will enable substantially all the light generated tobe reflected advantageously. The invention includes such a constructionof the globe with a view to accomplishing the objects intended and alsocontemplates an improved disposition of the reflecting-surfaces.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and definitely set forth in theclaim.

In the drawings, which fully illustrate my invention,Figure 1,represents my lamp in side elevation. Fig. 2 represents the outer globeof this lamp, substantially in side elevation, a portion being brokenaway, as indicated. Fig.

I 3 represents a reflector comprised in my invention, a portion of whichis broken away, as indicated. Fig. 4: represents in section the upperportion of thefinished globe.

Throughout the drawings and specification the same numerals of referenceindicate like parts.

Referring more particularly to the parts, 5 represents the globe or bulbof the lamp. This globe is most clearly shown in Fig. 2, this viewshowing it, however, before it has been incorporated into the lamp. Itshould appear that it consists substantially of a conical body 6,0fglass, provided with a wide open mouth or neck 7, and it should beobserved that the body near the lower portion of the neck is formed intoa curved shoulder 8, extending continuously around the globe.

Centrally disposed within the globe 5 there is a reflecting-cone 9,also-0f glass, which is shown clearly in Fig. 3. As will appear from aninspection, of that figure, this reflector is of substantially the formof two cones placed with their bases together, one of the cones beingtruncated. In this manner a double cone, as it were, is formed, theupper extremity whereof is out off, so that it constitutes a mouth 10. Aleading-in wire 11 passes axially downwardly through the cone 9, and atits tip 12 it unites with the lower end of the filament 13, whichfilament is disposed in a spiral around the outside of the saidreflecting, cone, in the manner indicated in Fig. 1. In

forming the complete globe, as shown in Fig.

2, the cone 9 is inserted within the same with its mouth 10 insubstantial alinement with the edge of the mouth 7 of the globe,whereupon the parts are raised to a high temperature, and the neck ormouth 7 when in a plastic condition is pressed inwardly against theouter surface of the cone 9 at this point in such a manner as to effectthe complete fusion or union between the cone and the globe, as will bereadily understood. In doing this the lower portion 14 of the lead 15 isheld between the uniting surfaces, so that after the operation iscompleted it lies embedded in the glass at this point. Its lowerextremity connects with the filament 13. As indicated, these leading-inwires 11 and 15 pass upwardly through the head 16 of the lamp andterminate at the contacts 17, which are adapted to complete the circuitconnections when the lamp-head is inserted in a suitable socket. Fig. 4represents substantially the appearance of the finished globe at itsupper portion.

It should be stated that before the cone 9 is incorporated with theglobe 5the said cone is silvered or provided with a coat 18 upon its 1inner surface in any well-known manner, so that the cone constitutes aneflicient reflector behind the filament. After the parts of the lamphave been completly assembled and the head 16 securely attached by meansof cement or similar means the aforesaid shoulder 8 is silvered orcovered with a coat 19 upon its outer side, as indicated in Fig. 4. Fromthis arrangement it should appear that a large proportion of the lightfrom the filament will be reflected downwardly directly by the lowerportion of the reflectingcone 9, and light which passes upwardly towardthe reflector 19 is of course returned downwardly toward the reflectorat this point. It should appear that substantially all the light isthrowninto the space below and around the lamp.

I prefer to have the angle of the cone 9 substantially the same as theangle of the inclosing globe 5, whereby their surfaces are substantiallyan equal'distance apart at all points.

It should be understood that a vacuum is formed within the outer globeafter the lamp is substantially complete. The vacuum may be produced inthe manner in vogue in making ordinary incandescent-lamp globes, theglobe being sealed at the'tip 20 in the usual manner.

WhileI have shown in the accompanying drawings the preferred form of myinvention, it will be understood that I do not limit myself to theprecise form shown, for many of the details may be changed in form orposi tion without effecting the operativeness or utility of myinvention, and I therefore reserve the right to make all suchmodifications as are included within the scope of the following claimsor of mechanical equivalents to the structures set forth.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is' m In an incandescent electric lamp, aglobe having a neck and a curved shoulder, the latter being providedwith a reflecting material upon its outer surface and curved to conformthereto, a glass cone disposed centrally within the globe and providedwith an interior coating of reflecting material, the cone and globebeing fused together, a leading-in wire passed axially downward throughthe cone, a filament disposed spirally outside the cone within the globeand connected with the tip of said wire, and a wire connected with saidfilament and held between the fused uniting surfaces of the cone andglobe.

Dated at Hamilton, Ontario, this 18th day of August, 1902.

HERBERT MUNRO TAYLOR.

In presence of E. G. MoCoY, WM. Bnucn.

